Ethereum Prioritizes Security Over Speed with Revised 2026 Timeline

The Ethereum Foundation has introduced a new technical roadmap that emphasizes security over speed for zero-knowledge Ethereum Virtual Machines (zkEVMs), outlining three significant milestones that extend through the end of 2026.

This change follows the successful reduction of proving times by zkEVM teams from 16 minutes to just 16 seconds, while also decreasing costs by a factor of 45, with 99% of Ethereum blocks now provable in under 10 seconds on designated hardware.

In spite of these performance improvements, the foundation cautioned that security is still “the elephant in the room,” as many STARK-based zkEVMs depend on unverified mathematical conjectures that recent studies have started to challenge.

“If an attacker can forge a proof, they can forge anything: mint tokens from nothing, rewrite state, steal funds,” the foundation remarked in a post dated December 18.

zkEVMs defeated the 2025 challenge: real-time proving
2026 challenge: 128-bit provable security
New blog post on the next phase for Ethereum zkEVMs: three milestones, paving the way to mainnet-grade L1 zkEVMs.https://t.co/mueR1JWW6c
Game on.

— George Kadianakis (@asn_d6) December 19, 2025

Provable Security Becomes Non-Negotiable Standard

The foundation has set 128-bit provable security as the essential target for mainnet-grade zkEVMs, in line with recommendations from cryptographic standardization organizations.

The first milestone mandates zkEVM teams to integrate their proof system components with soundcalc, a newly developed security estimation tool, by the end of February 2026.

By May 2026, teams are required to achieve 100-bit provable security with final proof sizes under 600 kilobytes while providing concise descriptions of their recursion architecture.

The final milestone necessitates 128-bit provable security, with proof sizes capped at 300 kilobytes, and formal security arguments for recursion soundness by the end of 2026.

George Kadianakis from the EF cryptography team highlighted the strategic importance of securing zkEVM architectures before they become dynamic targets.

“Once teams have reached these targets and zkVM architectures stabilize, the formal verification work we’ve been investing in can realize its full potential,” he stated.

Recent advancements in cryptography, including compact polynomial commitment schemes like WHIR, techniques such as JaggedPCS, and well-structured recursion topologies, now render these ambitious security goals attainable.

The foundation intends to release comprehensive technical posts in January detailing proof system techniques for meeting the security and proof size criteria.

Foundation Expands Institutional Adoption Push

While tightening technical standards, Ethereum has concurrently ramped up institutional outreach through its new “Ethereum for Institutions” portal launched in October.

This platform assists enterprises and financial institutions in building on Ethereum’s infrastructure, underscoring the network’s decade-long reliability with over 1.1 million validators and continuous uptime.

The foundation stressed the importance of privacy-preserving technologies, including zero-knowledge proofs, fully homomorphic encryption, and trusted execution environments, as vital for compliant institutional applications.

“Privacy solutions are no longer theoretical — they’re live and scaling in production,” the foundation remarked, referencing projects like Chainlink, RAILGUN, and Aztec Network.

Ethereum currently accommodates over 66% of all tokenized real-world assets according to RWA.xyz, with prominent financial firms such as BlackRock, Securitize, and Ondo Finance deploying tokenized instruments.

Source: RWA.xyz

JPMorgan Chase recently introduced its first tokenized money-market fund on Ethereum, seeding the MONY fund with $100 million and making it available to qualified investors with minimum investments of $1 million through its Kinexys Digital Assets platform.

The bank’s asset management head, John Donohue, informed the Wall Street Journal that there is “a massive amount of interest from clients around tokenization,” adding that JPMorgan anticipates leading the sector with product offerings that align with traditional money-market funds on the blockchain.

Simplicity Challenge Emerges as Critical Priority

Recently, Co-founder Vitalik Buterin identified protocol complexity as a significant threat to Ethereum’s trustlessness in a statement made on December 18.

“An important and underrated form of trustlessness is increasing the number of people who can actually understand the whole protocol from top to bottom,” Buterin noted, suggesting that the ecosystem should consider accepting fewer features if necessary to enhance understanding.

@VitalikButerin states Ethereum’s trustlessness relies not only on decentralization but also on how many individuals can comprehend the protocol.#Ethereum #Buterinhttps://t.co/mIcGdixX8Z

— Cryptonews.com (@cryptonews) December 18, 2025

This concern arose from the increasing tension between advanced functionality and accessibility as Ethereum’s technical abstractions expand.

“If only five people can understand how your privacy protocol works, you haven’t achieved trustlessness; you’ve merely changed who you trust,” privacy-focused layer-2 network INTMAX remarked.

The foundation recognized these challenges in its roadmap, describing Ethereum as “too complex” for most users while outlining plans for smart contract wallets that simplify gas fees and key management.

Meanwhile, the foundation temporarily halted open grant applications for its Ecosystem Support Program in August, citing intentions to transition toward more targeted infrastructure funding after distributing nearly $3 million to 105 projects in 2024 alone.

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